#ifndef __I386_STRING_H__
#define __I386_STRING_H__

#include <i386/mem.h>

#ifdef __cplusplus
extern "C" {
#endif

char *strcpy(char *dst, const char *src);
char *strncpy(char *dst, const char *src,int n);
int strcmp(const char *s1, const char *s2);
int strncmp(const char *s1, const char *s2,int n);
int strlen(const char *s);
char *strscn(char *s, char *pattern);
char *strchr(const char *s, int c);
char *strupr(char *s);
char *strlwr(char *s);
char *strcat(char *dst, const char *src);
char *strdup(const char *str);
int strcasecmp(const char *cs, const char *ct);
char *strstr(const char *s, const char *p);

char *strsep(char **s, const char *ct);

#define _U      0x01    /* upper */
#define _L      0x02    /* lower */
#define _D      0x04    /* digit */
#define _C      0x08    /* cntrl */
#define _P      0x10    /* punct */
#define _S      0x20    /* white space (space/lf/tab) */
#define _X      0x40    /* hex digit */
#define _SP     0x80    /* hard space (0x20) */

extern unsigned char _ctype[];

#define __ismask(x) (_ctype[(int)(unsigned char)(x)])

#define isalnum(c)      ((__ismask(c)&(_U|_L|_D)) != 0)
#define isalpha(c)      ((__ismask(c)&(_U|_L)) != 0)
#define iscntrl(c)      ((__ismask(c)&(_C)) != 0)
#define isdigit(c)      ((__ismask(c)&(_D)) != 0)
#define isgraph(c)      ((__ismask(c)&(_P|_U|_L|_D)) != 0)
#define islower(c)      ((__ismask(c)&(_L)) != 0)
#define isprint(c)      ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
#define ispunct(c)      ((__ismask(c)&(_P)) != 0)
#define isspace(c)      ((__ismask(c)&(_S)) != 0)
#define isupper(c)      ((__ismask(c)&(_U)) != 0)
#define isxdigit(c)     ((__ismask(c)&(_D|_X)) != 0)

#define isascii(c) (((unsigned char)(c))<=0x7f)
#define toascii(c) (((unsigned char)(c))&0x7f)


static inline unsigned char __tolower(unsigned char c) {
        if (isupper(c))
                c -= 'A'-'a';
        return c;
}

static inline unsigned char __toupper(unsigned char c) {
        if (islower(c))
                c -= 'a'-'A';
        return c;
}

#define tolower(c) __tolower(c)
#define toupper(c) __toupper(c)

#ifdef __cplusplus
}
#endif

#endif

